Abstract
Water deficit is an important exogenous factor that enhances the influx of sucrose into sugarcane (Saccharum spp.) stem internodes during ripening, when photosynthetic ability in supplying sinks is essential. The aim of this study was to test the hypothesis that drought tolerance in sugarcane is associated with an effective antioxidant protection during the ripening phase that might maintain a favorable redox balance in chloroplasts and protect photosynthesis under drought conditions. Two commercial sugarcane varieties, IACSP94-2094 (tolerant) and IACSP96-2042 (sensitive), with contrasting behavior under water deficit, were subjected to water withholding during the ripening stage. Our results revealed that the tolerant variety was less affected by water deficit, maintaining photosynthesis for a longer period and showing a faster recovery after rehydration as compared to the sensitive one. As consequence, the tolerant variety faced lesser excess of light energy at PSII. The maintenance of photosynthesis under water deficit and its fast recovery after rehydration resulted in the lower leaf H2O2 concentration and favorable redox status in the drought-tolerant genotype, which was associated with stimulation of superoxide dismutase during ripening. Our results also revealed that ferric superoxide dismutase isoforms were strongly enhanced under drought conditions, playing an important role in chloroplast redox homeostasis.
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Claims 9
Claim · model-written summary
The tolerant sugarcane variety IACSP94-2094 was less affected by water deficit than the sensitive variety
Verbatim
t0“Photosynthetic and antioxidant responses to drought during sugarcane ripening”
e1“Two commercial sugarcane varieties, IACSP94-2094 (tolerant) and IACSP96-2042 (sensitive), with contrasting behavior under water deficit, were subjected to water withholding during the ripening stage”
e2“Our results revealed that the tolerant variety was less affected by water deficit, maintaining photosynthesis for a longer period and showing a faster recovery after rehydration as compared to the sensitive one”
Claim · model-written summary
Water deficit maintained photosynthesis for a longer period in the tolerant sugarcane variety than in the sensitive one
Verbatim
t0“Photosynthetic and antioxidant responses to drought during sugarcane ripening”
e2“Our results revealed that the tolerant variety was less affected by water deficit, maintaining photosynthesis for a longer period and showing a faster recovery after rehydration as compared to the sensitive one”
Claim · model-written summary
The tolerant sugarcane variety recovered faster after rehydration than the sensitive one
Verbatim
t0“Photosynthetic and antioxidant responses to drought during sugarcane ripening”
e2“Our results revealed that the tolerant variety was less affected by water deficit, maintaining photosynthesis for a longer period and showing a faster recovery after rehydration as compared to the sensitive one”
Claim · model-written summary
The tolerant sugarcane variety had lesser excess of light energy at PSII
Verbatim
t0“Photosynthetic and antioxidant responses to drought during sugarcane ripening”
e3“As consequence, the tolerant variety faced lesser excess of light energy at PSII”
Claim · model-written summary
The drought-tolerant sugarcane genotype had lower leaf H2O2 concentration
Verbatim
t0“Photosynthetic and antioxidant responses to drought during sugarcane ripening”
e4“The maintenance of photosynthesis under water deficit and its fast recovery after rehydration resulted in the lower leaf H2O2 concentration and favorable redox status in the drought-tolerant genotype, which was associated with stimulation of superoxide dismutase during ripening”
Claim · model-written summary
The drought-tolerant sugarcane genotype had favorable redox status
Verbatim
t0“Photosynthetic and antioxidant responses to drought during sugarcane ripening”
e4“The maintenance of photosynthesis under water deficit and its fast recovery after rehydration resulted in the lower leaf H2O2 concentration and favorable redox status in the drought-tolerant genotype, which was associated with stimulation of superoxide dismutase during ripening”
Claim · model-written summary
Superoxide dismutase was stimulated during ripening in the drought-tolerant sugarcane genotype
Verbatim
t0“Photosynthetic and antioxidant responses to drought during sugarcane ripening”
e4“The maintenance of photosynthesis under water deficit and its fast recovery after rehydration resulted in the lower leaf H2O2 concentration and favorable redox status in the drought-tolerant genotype, which was associated with stimulation of superoxide dismutase during ripening”
Claim · model-written summary
Ferric superoxide dismutase isoforms were strongly enhanced under drought conditions in sugarcane
- Taxon
- sugarcanet0
- Treatment
- drought conditionse5
- Gene
- ferric superoxide dismutase isoformse5
- Outcome
- ferric superoxide dismutase isoformse5
- Direction
- strongly enhancede5
Not reportedComparator
Verbatim
t0“Photosynthetic and antioxidant responses to drought during sugarcane ripening”
e5“Our results also revealed that ferric superoxide dismutase isoforms were strongly enhanced under drought conditions, playing an important role in chloroplast redox homeostasis”
Claim · model-written summary
Ferric superoxide dismutase isoforms are asserted to play a role in chloroplast redox homeostasis in sugarcane
Verbatim
t0“Photosynthetic and antioxidant responses to drought during sugarcane ripening”
e5“Our results also revealed that ferric superoxide dismutase isoforms were strongly enhanced under drought conditions, playing an important role in chloroplast redox homeostasis”
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See all 25 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.